On the Efficiency of Electrochemical Devices from the Perspective of Endoreversible Thermodynamics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F19%3A43956370" target="_blank" >RIV/49777513:23640/19:43956370 - isvavai.cz</a>

Result on the web

<a href="http://hdl.handle.net/11025/35985" target="_blank" >http://hdl.handle.net/11025/35985</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/jnet-2018-0076" target="_blank" >10.1515/jnet-2018-0076</a>

Result language

angličtina

Original language name

On the Efficiency of Electrochemical Devices from the Perspective of Endoreversible Thermodynamics

Original language description

The current work presents a concept that deals with the production of entropy generated by nonequilibrium processes in consequence of mass and energy transfer. The often used concept of endoreversible thermodynamics is based on thenon-realistic conjecture that the entire entropy production is realized at the system boundary. In this contribution, anopen system in a thermodynamically non equilibrium state is assumed. Production of entropy is generated due to nonequilibrium processes accompanied by energy conversion. The steady state of the system is maintained by a negative entropy flux. The conclusions for expansion energy conversion, i. e., thermal machines, confirm the general outcomes of the endoreversible thermodynamics. However, the presented conclusions related to non-expansion energy conversion offer a new perspective on the principle of minimum entropy production and the corresponding stability conditions at steady state. The analysis of the energy conversion in closed cycles is presented for fuel cells, i. e., nonexpansion energy conversion. The efficiency of the energy conversion is maximal at zero power output. Moreover, the efficiency of the fuel cells, and consequently the efficiency of all non-expansion energy conversion processes, depends on the load and then the maximal possible efficiency can be determined.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20303 - Thermodynamics

Project

<a href="/en/project/LO1402" target="_blank" >LO1402: CENTEM+</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

JOURNAL OF NON-EQUILIBRIUM THERMODYNAMICS

ISSN

0340-0204

e-ISSN

—

Volume of the periodical

44

Issue of the periodical within the volume

4

Country of publishing house

DE - GERMANY

Number of pages

13

Pages from-to

425-437

UT code for WoS article

000489289200008

EID of the result in the Scopus database

2-s2.0-85072307474